PH Week 12 Reading Homework

PH Week 12 Reading Homework

by Rachel Wold

​CK-12 Readings

• ​Electromagnet

• ​Electromotive Force

• ​Electric Motor

Electromagnet​

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Multiple Choice

A ____is a long coil of wire consisting of many loops of wire that makes a complete circuit.

• motor

• electron motor

• free motor

• solenoid

Multiple Choice

An electromagnet is a piece of brass inside a solenoid.

• True

• False

Multiple Choice

Electromagnets are temporary magnets.

• True

• False

​Electromotive Force

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Multiple Choice

Electromotive force is a force.

• True

• False

Multiple Select

The EMF depends on which three things?

• the direction of the magnetic field

• the magnetic field strength

• the length of the wire in the magnetic field

• the velocity of the wire in the field

Open Ended

A straight wire 0.500 m long is moved straight up through a 0.400 T magnetic field pointed in the horizontal direction. The speed of the wire is 20.0 m/s.

What EMF is induced in the wire?

If the wire is part of a circuit with a total resistance of 6.00 Ω6.00 Ω, what is the current in the circuit?

Hint (use EMF=Blv and then use V=IR)